Quesadilla with chicken and cheddar

Preparation:
Finely chop the onion, fry it until light golden brown in a little oil. Transfer to a bowl.
Chicken fillet cut into thin cubes (no more than 1 cm thick) and fry in olive oil over high heat for 2 minutes, stirring occasionally.
Add the tomato paste, pepper and salt, stir, hold in the heat for half a minute, and to shift the meat to the onions.
Cheese grate. This can be cheddar, Parmesan, Gouda or other solid or semi-hard cheese.
One tortilla put on a hot dry frying pan, sprinkle it with a layer of cheese.
Put a layer of cheese filling on top of another layer of cheese. Then cover with a second tortilla.
Cook for 2-3 minutes, then gently turn over and fry on the other The Parties to 1-2 minutes.
Cut the quesadilla into four parts. Serve hot.